I kinda have to use firefox for some things...
#1 it's all that supports java decently well
#2 my new network switch uses a java web-management interface if I want to avoid SSH and PUTTY...
#3 pretty much all my network equipment has a web-gui, and Firefox strangely works really nice with all those different web-interfaces...
Aside from that, I do everything on Chrome... And it's more than Google that likes to collect information, every website likes to look at all your cookies and history. To be fairly blunt, I would trust Chrome before I would trust any other browser when it comes to overall security.
But I would trust no browser that has unfamiliar add-ons/extensions in their directory... A lot of malware attaches via extensions these days, and is a royal pita to remove.